Turn pumps, mixers, valves, and other equipment on or off based on the conductivity of a solution. These controllers compare input from a sensor (sold separately) to a programmed actuation point and react when the reading reaches the actuation point. They’re often used in water treatment and electroplating. Automatic temperature compensation standardizes readings at 77° F to prevent inaccurate results in fluctuating temperatures.

Controllers with mechanical relay output directly turn equipment on or off with two SPDT (single pole, double throw) relays.

Controllers with analog output send 4-20mA signals to a PLC or other receiving device (not included) to record data and control equipment.